Continuous-flow intersection
A cross with a continuous flow of traffic (English continuous flow intersection, short CFI), also towards shifted left turn (English crossover displaced left -turn short XDL and DLT ) is a non- employed in Germany at ground level crossing, shifting the vehicles turning from the conflict point of the transport node and thus a Ampelphase saves. This left turn between 80 and 150 meters previously conducted on a parallel track to now at the same time of turning with the other left turns are happy.
History
In the United States different variants since the 1950s have been built in different places, such as in the " Telegraph Road ", a section of U.S. Route 24 in Detroit, Michigan at 42 ° 22 ' 16.6 "N, 83 ° 16 ' 32 " W42.371267 - 83.275563. At the junction " Plymouth Road ", the two left lane of the " Telegraph Road " are ever in a 40 - connected to a 45 ° angle extending stretch of road. The two left turns of " Plymouth Road " are guided over Michigan Left.
1987 Francisco Mier had logged in Mexico, the variant with parallel lanes, the 1991 U.S. Patent 5,049,000 assigned. More than 40 intersections were converted to this method in the 1990s in the United States. In order to obtain the rights for the use of the design, the agencies with the patent fees had to pay in advance. Patent protection has expired in the United States in 2003 due to non-payment of patent fees.
Operation
The difference with other transport nodes is a between 80 and 150 m long parallel section. Under already built traffic nodes dominate lengths of 120 m. The increase in capacity is achieved by the left einbiegenden vehicles together with the left turning vehicles crossing the main direction. Since they also are in conflict with each other, the parallel section is required. As the two left turn the mainstream cross joint, it must now be stopped only once. There is more time for the two directions within the orbital period of the traffic lights. In order to keep a green wave within the node, the travel time is considered in the parallel section. In practice prerouted Linksabbieger get this running time later, her green signal to switch on the parallel track. This results in a further time window, since moving vehicles require less time than anfahrende vehicles to pass through the parallel path. This eliminates the need, in some cases the opposite direction of the parallel roadway. To see this is on the Bangerter Highway in West Valley City, Utah at 40 ° 40 ' 55.7 "N, 111 ° 58' 53.9 " W40.682132 - 111.981626. In this case, the right turn is permitted only under signal because the left turn come in unexpected places in conflict. The proper interpretation of traffic node, the length of the parallel section of the path corresponds to the traveling time of the designated traffic light phase. This field is required for vehicles turning left twice. Once Collectible brought forward on the left turn Gerst tires and once for transit on the parallel track. The opposite has pre-screening for the right turn at this phase shifted red, because now turn prerouted left turn parallel to the through traffic conflicts. Through traffic flows at this moment again. With these Rechtsabbiegern the left turn drive as a conventional node on the same road. The node has no pedestrian crossings, the right turn to subordinated classify themselves over a shorter precipitating the acceleration lane or when sufficient lanes are available, are returned to this. In one lane of the road can make the left turn at this unexpected place recognizable as such when the right turn out to be a Ausfahrkeil. Now finding a more manageable traffic on this road before, in which they turn and recognize their priority. This has been applied in the construction of Springboro Road in Miami Township in Clermont County, Ohio at 39 ° 35 ' 48.2 "N, 84 ° 13' 44.5 " W39.596709 - 84.229029. In the field of parallel routes green waves are connected to through traffic and traffic turning left within the node. In this way, must be stopped just before the node. The areas within the parallel lines are optical signal to have protected crossings for backflow or slow vehicles. Because of the now longer green phases integration into a green wave to other nodes is more feasible, and the traffic node itself has a higher capacity. All vehicles to stop in normal operation only at most once, and go no detours. In order to limit the number of each other without conflict to be switched in groups of two directions of traffic, so the traffic must use only two directions, a three-armed transport hub in one direction pre-routed left turns, a four-armed node requires the bringing forward of all four left turns. There are four-armed nodes that only have two opposing pre-routed left turns and three instead of four to be switched traffic directions.
Performance
The development department of the Federal Highway Administration determined at a CFI over a traditional transport hub: